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Minerals
Naturally occurring substance that is solid and stable at room temperature, representable by a chemical formula, usually abiogenic, and has an ordered atomic structure. It is different from a rock, which can be an aggregate of minerals or non-minerals, and does not have a specific chemical composition. The general definition of a mineral encompasses the following criteria: 1 - Naturally occurring 2 - Stable at room temperature 3 - Represented by a chemical formula 4 - Usually abiogenic 5 - Ordered atomic arrangement
Contributors in Minerals
Minerals
nyerereite
Geology; Minerals
Nyerereite is a very rare sodium calcium carbonate mineral with formula Na 2 Ca(CO 3 ) 2 . It forms colorless, platey pseudohexagonal orthorhombic crystals that are typically twinned. It has a ...
pseudowollastonite
Geology; Minerals
Pseudowollastonite is a high-temperature polymorph of wollastonite. Its formula can be written as CaSiO 3 or as Ca 3 Si 3 O 9 . Other names include wollastonite 7T, ß-Wollastonite, and ...
abenakiite-(Ce)
Geology; Minerals
Abenakiite-(Ce) (or IMA 1991-054) is a mineral of sodium, cerium, neodymium, lanthanum, praseodymium, thorium, samarium, oxygen, sulfur, carbon, phosphorus, and silicon with a chemical formula Na 26 ...
